Please provide any additional information below.

macOS isn't able to open a file without extension. In order to just view it, I have to git annex unlock it, so that there's a real file with an extension. Is there a way to tell macOS to use symlink extension instead? Or other workaround?

Have you had any luck using git-annex before? (Sometimes we get tired of reading bug reports all day and a lil' positive end note does wonders)